People with greater spinal flexibility (large range-of motion) fit a wider range of sizes when they choose chairs, portable supports, beds, and neck pillows. Those with back problems or with less flexibility (small range-of-motion) need a more precise fit.
![](Images/learn/Anatomy/FlexFit1.JPG) Larger spinal flexibility |
![](Images/learn/Anatomy/FlexFit2.JPG) Smaller spinal flexibility |